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Editorial Team
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Asked: 2026-06-15T08:39:54+00:00

#include <iostream> #include <fstream> #include <iterator> #include <vector> int main() { std::ifstream file(data.bin, std::ios::binary

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#include <iostream>
#include <fstream>
#include <iterator>
#include <vector>

int main()
{
    std::ifstream file("data.bin", std::ios::binary );

    if( file.fail() )
    {
        std::cout << "File does not exist or could not open file";

        return 0;
    }

    std::vector<short> buffer;

    std::copy( 
            std::istreambuf_iterator<char>( file ),
            std::istreambuf_iterator<char>(),
            std::back_inserter( buffer )
            );

   return 0;
}

This only gives me ranges of char values (-128, 128).

I thought using istreambuf_iterator<short> would give me what I want but it throws an “invalid conversion” error.

What can I do to read binary values that are in the short range?

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1 Answer

  1. Editorial Team

    Here’s my recommended Spirit approach:

    #include <fstream>
#include <boost/spirit/include/qi.hpp>

namespace qi = boost::spirit::qi;

int main()
{
    std::ifstream file("data.bin", std::ios::binary);
    if(!file)
        std::cout << "File does not exist or could not open file";
    boost::spirit::istream_iterator f(file), l;

    std::vector<int16_t> buffer;
    bool ok = qi::parse(f, l, *qi::word, buffer);
}

    Of course, there is qi::dword, qi::qword, big-endian/little-endian variatations etc.:

    You can look at wchar_t

    #include <iostream>
#include <fstream>
#include <iterator>
#include <vector>
int main()
{
    std::wifstream file("data.bin", std::ios::binary );
    if( file.fail() )
    {
        std::cout << "File does not exist or could not open file";
        return 0;
    }
    std::vector<wchar_t> buffer;
    std::copy( 
            std::istreambuf_iterator<wchar_t>( file ),
            std::istreambuf_iterator<wchar_t>(),
            std::back_inserter( buffer )
            );
}

    I’m not too sure whether the actual size of wchar_t is implementation defined.

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